手法を比較

	短縮版一般化可能性理論	短縮版信頼性分析
分野	心理測定学	心理測定学
系統	Latent structure	Latent structure
提唱年	1963–1972 (G-theory); short-form extension ongoing from 1980s	1990s–2000s
提唱者	Lee J. Cronbach, Goldine Gleser, Harinder Nanda, Nageswari Rajaratnam	Conventional practice; codified notably by Smith, McCarthy & Anderson (2000) and Stanton et al. (2002)
種類	Reliability / decision-study framework	Scale development / psychometric evaluation
原典	Brennan, R. L. (2001). Generalizability Theory. Springer. ISBN: 978-0387952826	Stanton, J. M., Sinar, E. F., Balzer, W. K. & Smith, P. C. (2002). Issues and strategies for reducing the length of self-report scales. Personnel Psychology, 55(1), 167–194.
別名	G-theory for abbreviated scales, short-form G-study, abbreviated test generalizability, short-form D-study	abbreviated scale reliability, short-form validation, scale shortening, item reduction reliability
関連	5	6
概要	Short form generalizability theory applies the G-theory variance-component framework to abbreviated measurement instruments, using G-studies and D-studies to estimate how many items a short scale must retain to achieve a desired reliability and to evaluate the accuracy of decisions made with a condensed instrument.	Short-form reliability analysis evaluates whether an abbreviated version of a psychological scale maintains acceptable internal consistency, validity, and structural integrity after items are removed. It is used in survey and assessment research to create briefer instruments that reduce respondent burden without sacrificing measurement quality.